Complete the following program to determine the raise and new salary for
an employee by adding if ... else statements to compute the raise.
  The input to the program includes the current annual salary
for the employee and a number in the range 1 - 10 indicating the performance rating
(10 is the best; 1 the worst rating).  An employee with a rating of 7 or greater
 will receive a 5% raise and all others will receive a 2% raise.  An employee
receiving a rating of 10 will receive an extra $500.  
// ***********************************************************
// File:  Salary.java
//
// Compute the raise and new salary for an employee
// ***********************************************************
import cs1.Keyboard;
public class Salary
{
   public static void main (String[] args)
   {
      double currentSalary;  // current annual salary
      int rating;            // performance rating
      double raise;          // dollar amount of the raise
      // Get the current salary and performance rating
      System.out.print ("Enter the current salary: ");
      currentSalary = Keyboard.readDouble();
      System.out.print ("Enter the performance rating: ");
      rating = Keyboard.readInt();
      // Compute the basic raise -- Use if ... else ...
       // Add an extra $500 to the raise if the performance rating is 10
       // (use an if with no else!)
      // Print the results
      System.out.println ("Amount of your raise: $" + raise);
      System.out.println ("Your new salary: $" + currentSalary + raise);
   }
}